Rotary printing press



March 17,- man.

M. OXENHANDLER ROTARY PRINTING PRESS Filed March 29. 1929 2 Shuts-Sheet 1 INVENTOR 2P figgwdlw March 17, 1931. M, QXENHANDLER' 1,796,692

ROTARY PRINTING PRESS Filed March 29, 1929 2 Sheets-Sheet 2 Fig -5.

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A RNEY Patented Mar. 17, 1931 PATENT OFFICE MORRIS OXENHANDLER, OF BROOKLYN, NEW YORK ROTARY PRINTING PRESS AppIication filed March 29, 1929. Serial No. 351,081.

This invention relates to improvements in rotary die presses and more particularly to a novel and improved mechanism for retaining and guiding the paper stock while it is being printed for machines of the type shown and described in my Patent No. 1,7 06,- 319, granted Mar. 19, 1929.

One of the objects of my invention is to provide a multifaced rotary member with a 1 series of clamping elements constructed and arranged to engage and release the paper stock during the intermittent rotary motion imparted to the rotary member.

'More specifically my invention relates to an automatic clamping mechanism and guide for paper stock as employed in connection with the multifaced, intermittent rotary member of a die press including provision for releasing the clamping mechanism and the stock held thereby in timed relation lgvith the movement of the said rotary memer. To enable others skilled in the art to more fully comprehend the underlying features of my invention, reference is had to the accompanying drawing forming a part of the specification in which Fig. 1 is a side view partly broken away showing the application of my invention to u one type of rotary die press.

Fig. 2 is a partly sectioned sectional end view of the press of Fig. 1.

' Fig. 3 is a top plan of the edge clamping mechanism.

Fig. 4 is a front view thereof. Fig. 5 is a view taken on the line 5-5 of Fig. 3. 4

Fig. 6 is a front view of the shaft and side guides.

Fig. 7 is a side view of a side guide.

Fig. 8 is a front view of a shaft and straightener arms.

Fig. 9 is a side View of one of the straightener arms.

Referring now to the drawings, 5, 6 designates the sides of a stationary frame of a die press which support the shaft 7 of a multifaced, non-reciprocatory member 8 which is driven intermittently by suitable mechanism as shown and described in my patent heretofore referred to.

On each side of the support, there is provided an upwardly and outwardly curved bracket 9 which supports a stationary shaft 10. A pair of sleeves 11 adjustable in a keyway slot in the shaft 10 are adapted to be retained in their adjusted positions by set screws 12. Mounted on each sleeve 11, I provide a rotatable collar 13 having a forwardly curved guide arm 14 equipped with a friction roller 15 adapted to engage the face of the multifaced rotary member and adapted to roll over the faces of said member, when it is rotated. A curved spring 15a, which is fastened at one end to the sleeve and at its opposite end to the curved arm, normally maintains the rollers in engagement with the rotary member. The guide arms may thus be set in accordance with the width of the paper stock to be printed which may be centered for the die press between the rollers carried by said arms.

Each face of the rotary member is provided with a combination clamp and guide consisting of a vertical plate 16 having a top flange or clamping hook 17 The plate is movable in a recess formed in the rotary member and the flange or hook portion is normally flush with the surface of the face of the rotary member.

The plate 16 cooperates with countersunk end guides, 18, 19 in the said rotary member, each of said guides and plate having a circular seat for a spring 20, the upper end of each of said springs engaging a screw head 20a of an elongated screw 21 which is threaded into the rotary member. At each end of the movable plate, I provide pin projections 22, 23 which are adapted to engage the front lifting cams 24 located 011 the inner sides of the main stationary supporting frame thus lifting or raising the plate and its clamping hook against the resistance of the springs and per- A mitting the marginal edge of the paper stock to be positioned on the face of the rotary member. As the rotary member is advanced and the pins ride over the cams, the clamping hook will be urged downwardly by the springs into engagement with the paper stock to prevent any lateral movement. To release the clamping hook from the paper stock after the impression has been made, I also provide a pair of rear releasing cams which trips the projections when the face 26 of the rotary member is in the position shown by Fig. 1 of the drawing. The paper stock when thus released falls by gravity.

In order to retain the paper stock in a flat condition and prevent its bulging when-on the face of the rotary member and in position to receive the impression from the die, I'also provide a second shaft 2'1 mounted in suitable bearings on the sides of the main stationary frame, which shaft is also formed with alreyway slot for adjustable sleeves 28 heldby set screws 29. ()n the sleeves are freely rotatable collars, 30 of the straightener arms 31. The arms 31 are ofa length'toextend across the top of the rotary member, each of said arms having a spring 32 attached thereto and to the sleeve, so as to return them in. engagement with the top face of therotary member upon each movement thereof. In other words, as the multifaced member isintermittently rotated, the top face lifts the straightenerarms andias the next face is brought into position to receive the impression, the springs force the straightener arms, down into engagement with the sides of the paper stock. In orderto provide a clearance. for the top of the clamping plate, the straightener arms, are bentupwardly as at 33.

The operation ofthe mechanism above de scribed may be clearly, seen from Fig. 1 when it is understood that the. rotary member is intermittently reciprocated in timed relation to receive impression, To position the paper stock the clamping hook must be'in its raised positionand when the projections or pins are'en'gaged by the front or lifting cams. lhe 'arms assist the operator. in guiding the paper, stock, to 'beengaged'by the clamping hook, As the rotary member is rotated or advanced, the clamping hook comes down as tension is released on the springs, and the face of the. rotary member is in position to receivelthe impression from the die. At this point, the straightener armsare parallel with thetop face of the rotary member and preventsthe paper stock. from bulging or rais ing. As the rotary member is again advanced or rotated, the rear cams, engage the projections releasing the. clamping hook whereby the paper stock may fall by gravity to the rear of the machine. I

While .I have shown and described my invention with some degree of particularity, it

will berealized that other modifications and changes may be resorted to under special conditions. I therefore do not wish to be limited and restricted to the exact detailsshown and described butv reservethe right to makewith one face of the rotary member and its clamping means and cams for intermittently releasing the clamping means during the rotation of the rotary member.

2. In a press, the combination of a supporting frame, and a multifaced rotary member,

clamping. means carried by each face of the rotary member for retaining the paper stock, straightener arms pivotally connected tothe sides of the supporting frame for successively engaging the faces of the rotary. member and front and rear cams on the supporting frame for intermittently releasing the clamping means during the rotation of the. rotary member. 7

3. In a press, the combination of a supporting frame, and a multifaced rotary member, clamping means carried by eachface of the rotary member for retaining the paper stock, a stationary shaft having adjustable guides pivotally mounted on the shaft, rollers carried by the guides for successivelyengaging oneface of the rotary member and camsfor intermittently releasing the clamping means during the rotation of the rotary member.

4. Ina press, the combination of a supporting frame and a multifaced rotary member, clamping means carried by each face of the rotary member and movable at right angles to said face for retaining the paper stock, and means on the supporting frame for releasing said clamping means on opposite-faces ofthe rotary member during its rotation.

5. In a press, the combination of a support.- ing frame, a multifaced rotary member, clamping means carriedby each face of'the rotary member andmovablev at rightv angles thereto, spring means normally tensioning said clamping means in a direction at] right angles with the respective face onto saidface for retaining the paper stock, andmeans on the supporting frame for operatingsaid clamping meanson opposite faces of the rotary member during its rotation.

6. In a press, the combination of a supporting frame, a 'multifaced rotary member, clamping means in connection with each face of" said rotary. member comprisingaplate and a clamping hook and movable in said rotary member in the direction of-the plane of said plate, said clamping hookextending laterally from said plate overone end of the respective face forretaining the paper stock, and means on the supporting frame forlift ing said clamping means from the faces of the rotary member during its rotation.

7 In a press, the combination of a supporting frame, a multifaced rotary member, clamping means in connection with each face of said rotary member comprising a plate and a clamping hook and movable in said rotary member in the direction of the plane of said plate, said clamping hook extending laterally from said plate over one end of the respective face for retaining the paper stock, spring means linearly tensioning said clamping means into said rotary member, and means on the supporting frame for lifting said clamping means from the faces of the rotary member during its rotation.

8. In a press, the combination of a sup porting frame, a multifaced rotary member, a pair of guides in each face of said rotary member at the sides thereof and right angularly extending from said faces into said rotary member, clamping means co-operating with said guides and each comprising a plate and a clamping hook right angularly connected to said plate, said plate extending into said rotary member and said clamping hook extending over a face of said rotary member, and spring means in said guides tensioning said clamping hooks onto said faces in a direction substantially at right angles to said faces to permit the engagement of the paper stock between said clamping hooks and said faces of the rotary member.

9. In a press, the combination of a supporting frame, a multifaced rotary member, guides in each face of said rotary member and extending thereinto from said face, clamping means co-operating with said guides, spring means in said guides tensioning said clamping means onto said faces at right angles to said faces, pin projections protruding from the ends of said clamping means, cams on said frame adapted to engage upon said pin projections and to 11ft said clamping means away from said faces substantially right-angularly to said faces, when said multifaced member is rotated.

10. In a press, the combination of a supporting frame, a multifaced rotary member,

a shaft across the supporting frame, guide arms rotatably mounted upon said shaft, and rollers mounted upon the ends of said gulde arms resting upon the faces of said rotary member and adapted to roll over the faces of said rotary member, when it is rotated.

11. In a press, the combination of a supporting frame, a multifaced rotary member, a shaft across the supporting frame, guide arms rotatably mounted upon said shaft and laterally adjustable thereon, and rollers mounted upon the ends of said guide arms resting upon the faces of said rotary member and adapted to roll over the faces of said rotary member, when it is rotated.

12. In a press, the combination of a supporting frame, a multifaced rotary member, a shaft across the supporting frame, guide arms rotatably mounted upon said shaft, rollers mounted upon the ends of said guide arms, and spring means tensioning said guide arms in a direction onto said rotary member, so that the rollers on said guides are engaged upon the faces of said rotary member.

13. In a press, the combination of a supporting frame, a multifaced rotary member, straightener arms swingably supported in said frame and adapted to rest upon the surface of said rotary member, and tension means adapted to swing said straightener arms into flat engagement with the faces of said multifaced rotary member.

14. In a press, the combination of a supporting frame, a. multifaced rotary member, laterally adjustable straightener arms swingably supported in said frame and adapted to rest upon the surface of said rotary member, and tension means adapted to swing said straightener arms into fiat engagement with the faces of said multifaced rotary member.

In testimony whereof I aflix my signature.

MORRIS OXENHANDLER. 

